XXXlll. 



15th— Bon Chretien pear commencing to ripen. 

 16th— Green gage pluni ditto. 

 26th — Common ash commencing to shed seed. 

 26th — Sycamore ditto. 



Barometer mean, 29819in., being0036in. below the average. 



Temperature mean, 64 .5(3°, being 4 SO" above the average. 



Solar intensity mean, 10G"25^ being 2 96' above the average. 



Dew point mean, 51 2", being 198 above tlie average. 



Humidity of air mean, 65, being 06 per cent, below the average. 



Elastic force of vapour mean, 390, being 034 above the average. 



Total amount of rain, ISSin., being 0'32in. below the average. 



Increase of spontaneous evaporation on rain fall, 2 87in. 



Mean amount of ozone, 508, being 193 of chromatic scale below the average. 



Electricity active on the 5th, Sth, 9th, 10th, 11th, 14th, 15th, and 20th. 



Hot wind on the 19th. Thunder and rain on the 28th. 



FRANCIS ABBOTT. 



NOTES ON THE METEOROLOGY AND MORTALITY OF 

 THE MONTH OF FEBRUARY, 1871. 



By Dr. E. Swarbreck Hall. 



The atmospherical i^henomena of the month varied considerably from the 

 25 years' adopted standard mean for February, but were not on the whole 

 unfavourable to health and life. The deaths were twelve less in number 

 than the average of the previous 14 years, and six less than February, 1870, 

 had. 



Atmospho'ic 2^ressure mean, 29'879, was x '048 only above the mean. The 

 greatest pressure on any day was, 30 "1.56, on the 21st ; and the lowest 

 was, 29-298, on the 7th. The month's range therefore was only -8.58, being 

 less than in any February since 1863. The greatest movement of the 

 barometer in any 24 hours was a fall of — '448 on the 7th, which was not 

 unusual in any respect. There were, however, 10 other days on which the 

 variations exceeded one-fifth of an inch. 



Wind-force in the aggregate amounted to 43 "96 lbs., being — 13 "14 less 

 than the February average. North-ivest vdnds predominated over all others, 

 both in frequency and force, and were greatly in excess of the February 

 mean. On the other hand north wind was only noted once, and without 

 force (a calm) ; while the February average is 14"ll in number, 8*21 in force. 

 South-east winds were considerably more numerous than usual, but a trifle 

 below the average force. The strongest winds, 5*21 lbs. in force, were 

 noted tvsdce on the 19th, and were north-west hot loinds. Calms weve + 5*33 

 above the Februaiy mean. 



Temperature mean, 64 "56, was + 2*68 degrees above the 25 years' mean, 

 only 1866 and 1855, during the past 30 years, had higher means, i.e., 6519 

 and 68 '00 respectively. Maximum, 86, was noted on the 19th. It has often 

 been exceeded. Minimum, 47, was recorded four times, being the highest, 

 with the exceptions of 1866, 1845, 1843, 1841, in the previous 30 years. The 

 wet-bulb thermometer mean, 57 "45, was + 1'74 above the mean. 



Daily-range of Temperature mean, 22 '93 degrees, was -H 3'18 above the 

 average. It was never so high since 1859, when it was 23*17, and only in 

 three other years of the 30 had February a higher daily-range than the pre- 

 sent month, i.e., 1857, 1856, 1841. The greatest range on any day was 34 

 degrees on the 19th, and that has often been exceeded in former years. 



Solar intensity mean, 106 '25 degrees, was — 1"62 below the average. 

 The greatest on any day was 120, recorded on the 2nd and 19th, and the lowest 

 since 1861. It is remarkable that the sun's heat should be so low while 

 mean shade temperatui-e was so high, more especially as the cloud mean 

 was below the average. 



Terrestrial radiation mean, 49-23, was only— '34 below the average. 

 The lowest in any night was 44*5 on the 10th. In every year recorded, 

 except 1866, when it was the same, the minima have been much lower. 



Elastic force of Vajmcr, 390, was + 16 above the average. It ranged 



